What Is a Wet Bag? Uses for Daycare, Swimming and Toilet Training

Quick answer

A wet bag is a reusable water-resistant or waterproof-lined bag used to separate damp, dirty or soiled items from clean belongings. Families commonly use wet bags for daycare, childcare, swimming lessons, toilet training, cloth nappies, messy play and travel.

A wet bag folds flat when empty and can be washed and reused, making it a practical alternative to carrying disposable plastic bags for routine family messes.

Sarah-Jane Collection large waterproof wet bag in Puppies print

What is a wet bag used for?

A wet bag creates a separate place for items you do not want loose inside a backpack, swimming bag, pram or suitcase.

  • Daycare and childcare: food-covered, painted, muddy or soiled clothing.
  • Swimming: damp swimmers, reusable swim nappies and small towels.
  • Toilet training: wet underwear, training pants, shorts and socks after an accident.
  • Cloth nappies: used nappies and reusable wipes while away from home.
  • Messy play: paint, water-play or mud-covered clothes.
  • Travel: toiletries, damp washcloths or small laundry items.

Wet bags for daycare and childcare

A wet bag is particularly useful at childcare because clean clothing may need to be replaced after food spills, water play, paint or toilet-training accidents. Educators can place wet or soiled clothes inside for the trip home.

For a complete packing list, use our Australian daycare and childcare essentials checklist.

Wet bags for swimming lessons

After swimming, wring excess water from swimmers and reusable swim nappies before placing them in the wet bag. A wet bag helps keep damp items separate from dry clothing, but it is not intended to hold free-standing water.

Wet bags for toilet training

During toilet training, pack one or two complete clothing changes and keep an empty wet bag easy for carers to find. After an accident, wet clothing can travel home separately from clean items.

What size wet bag do I need?

  • Small, approximately 25 × 20 cm: suitable for one swim nappy, baby swimmers, reusable wipes or a compact clothing change.
  • Large, approximately 40 × 30 cm: better for wet swimwear and a towel, multiple nappies or several pieces of daycare clothing.

A large wet bag is the more versatile option for daycare, toilet training and family swimming days.

Wet bag versus a disposable plastic bag

Feature Reusable wet bag Disposable plastic bag
Reuse Designed to be washed and reused Usually discarded after limited use
Closure Secure zip closure Often tied or left open

How to clean a wet bag

Wipe the bag clean between light uses or cold machine wash it when needed. Line dry or tumble dry on low, follow the supplied care instructions and empty the bag promptly after returning home.

How many wet bags does a child need?

One large wet bag covers most everyday needs. Two can be useful during toilet training, frequent swimming lessons or childcare weeks because one can remain packed while the other is being washed.

Frequently asked questions

Are wet bags completely leak-proof?
Wet bags are designed to contain damp items, but they should not be used to carry free-standing water.

Can a wet bag hold dirty daycare clothes?
Yes. A large wet bag can separate food-covered, muddy, painted or soiled clothes from clean items.

Can wet bags be machine washed?
Sarah-Jane Collection wet bags can be cold machine washed when needed. Follow the product care instructions and avoid high heat.

What is the best wet bag size for daycare?
A large bag around 40 × 30 cm is usually the most versatile childcare option.

Wet bags also make practical baby shower gifts and first birthday gifts for one-year-olds.

Shop waterproof wet bags